Google contributes KVM patches upstream. See https://www.phoronix.com/news/KVM-CPUFreq-RFC-Patches https://www.phoronix.com/news/KVM-CPUFreq-RFC-Patches , https

Google contributes KVM patches upstream. See https://www.phoronix.com/news/KVM-CPUFreq-RFC-Patches https://www.phoronix.com/news/KVM-CPUFreq-RFC-Patches , https://www.phoronix.com/news/Google-New-ASI-KVM-2022 https://www.phoronix.com/news/Google-New-ASI-KVM-2022, https://www.phoronix.com/forums/forum/hardware/processors-memory/1310772-google-posts-new-asi-patches-for-kvm-to-help-fight-off-speculative-execution-attacks https://www.phoronix.com/forums/forum/hardware/processors-me... Regarding AWS, I would also add Firecracker for AWS Lambda, which uses KVM.